A bolt of lightening strikes near the top of the Willis tower in downtown Chicago, Monday, June 30, 2014, as rain and high winds were moving into Illinois from Iowa. Some flights are canceled at ... more

A bolt of lightening strikes near the top of the Willis tower in downtown Chicago, Monday, June 30, 2014, as rain and high winds were moving into Illinois from Iowa. Some flights are canceled at Chicago's O'Hare International Airport as northern Illinois braces for severe weather. (AP Photo/Kiichiro Sato) less